En översiktlig miljöteknisk markundersökning : En fallstudie för att undersöka dioxinförekomst vid en nedlagd sågverksamhet i Lövsele, Västerbottens län

Sawmills which conducted dipping operations is a breach where previously used chemicals mean that you generally can expect to find contaminated areas. To investigate contaminated areas the Swedish environmental protection agency developed a method for investigation of polluted areas (MIFO). The purpose of a MIFO analysis is to provide a unified approach and risk classification system for polluted areas. The aim of this thesis it to perform a soil survey according to MIFO phase 2 (general investigations) at the former sawmill in Lövsele, Västerbotten county. The study is based on assumptions about the presence of dioxins in the area, due to the previous use of the wood preservative Ky-5. Dioxins are dangerous substances and are considered poisonous for both humans and the environment. The field study was conducted 30 September 2016 in 8 selected points where the greatest risk to find dioxins were considers to exist after completion of background investigations. 9 samples were the chosen for analysis by ALS Scandinavia AB. The completed analysis shows that pollution levels above the guideline values of both sensitive land use (KM) and less sensitive land use (MKM) were discovered in 7 out of 9 analyzed samples. The MIFO analysis was conducted to answer questions about the pollution hazards, pollution level, distribution conditions and the sensitivity and protection value in the area. The result of the MIFO-analysis is evaluated as class 1, very high risk to human health and the environment. Further studies should therefore be conducted to determine the pollution situation in the area and to provide data for remediation measures to reduce the risk to human health and the environment